This week, Mark and Margaret speak with Dr. Otis Brawley, Chief Medical Officer and Executive Vice President of the American Cancer Society. Dr. Brawley speaks about his new book, “How We Do Harm: A Doctor Breaks Ranks and Talks About Being Sick in America”. Dr Brawley explores racial and ethnic disparities in cancer survival and looks at the costs incurred from overuse of certain cancer screenings that are not leading to better health outcomes.